Use the Additive Inverse Starter File to complete this page. Do not click "Run" yet.
1 In the table below, record your Noticings and Wonderings about what you see in the Definitions Window (left side) of the Additive Inverse Starter File.
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2 Click "Run." At the top of the Interactions Area on the right side, a message appears that says, "7 TESTS PASSED, 4 TESTS FAILED." Summarize the remaining information that appears when we click "Show Details" by filling in the blanks, below.
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In the first examples block (lines 6-10), all 5 tests .
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In the second examples block (lines 18-22), out of 5 tests passed.
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In the third examples block (line ), the test .
3 First, let’s explore examples-block-1. Click "Show Details" on the right side of the green examples-block-1 rectangle. In your own words, describe why each of the tests in examples-block-1 passed.
4 Let’s look at examples-block-2 next. Select "Show Details" in the upper right of examples-block-2.
5 Below, place a checkmark next to each of the examples that passed from examples-block-2.
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6 Edit each of the failing examples on the left so that all examples pass when you click "Run". Be sure to change only the part of the example after the is! Describe one of the changes you had to make.
7 Let’s explore examples-block-3. Below line 26 (3: My Own Example Block), create a block of 5 passing examples of your own. Be sure to enter examples: at the beginning, and then close by typing in end. Hit "Run" to see if your examples pass. If not, revise them until they do. If you encountered an error message along the way, describe it here:
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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